| 摘要 |
PURPOSE:To facilitate the wind/rewind of a coaxial double-stage reel, by providing an automatic selection clutch to turn the driving wheels corresponding to one direction and the other direction. CONSTITUTION:A film winding reel 6 and a film feeding reel 5 are provided on the same shaft 26 and then driven by a motor 10 via an automatic selection clutch 19. The clutch 19 comprises the pulleys 22, 21 and 23. When the pulley 21 turns clockwise, the upper edge 41d of a catch 41c of a selection lever 41 hooks to the cam 22a of the pulley 22. While the catch (not shown in the figure) of the lever 41 hooks to the cam 23a of the pulley 23 when the pulley 21 turns counterclockwise. Therefore the reel 6 is turned via the pulley 22, a belt 36, a pulley 35 and a friction pad 37 after turning the pulley 21 clockwise by the motor 10 in the film winding mode. In the film rewinding mode, the pulley 21 is turned counterclockwise to turn the reel 5 in the rewinding direction via the pulley 23, belt 29, a pulley 28, a rotary shaft 26, a disk 31 and a friction pad 30 respectively. |
